首页 > 代码库 > 【Jqurey EasyUI+Asp.net】---DataGrid的增、删、改、查
【Jqurey EasyUI+Asp.net】---DataGrid的增、删、改、查
前面是写了两篇，但都不怎么完整，比较才刚开始学这个，都是摸着石头过河，一步一步的来。这两天终于把DataGrid的增删改查融合到一起了，所以分享一下，希望对和我一样的初学者都点帮助。
直接主题吧。
还是想说数据表吧，我建了一个很简单的表Rex_Test
| ID | 自增序号 |
| tName | 姓名 |
| tEmail | 邮箱 |
前台代码：
Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<link rel="stylesheet" type="text/css" href="jquery-easyui-1.3.6/themes/default/easyui.css" />
<link rel="stylesheet" type="text/css" href="jquery-easyui-1.3.6/themes/icon.css" />
<link rel="stylesheet" type="text/css" href="demo.css" />
<script type="text/javascript" src="jquery-easyui-1.3.6/jquery.min.js"></script>
<script type="text/javascript" src="jquery-easyui-1.3.6/jquery.easyui.min.js"></script>
<script type="text/javascript">
function getQueryParams(queryParams)
{
var tkey = document.getElementById("tkey").value;
//alert(tkey);
//$("#quanxian").combobox("getValue");
queryParams.tkey = tkey;
return queryParams;
}
//增加查询参数，重新加载表格
function reloadgrid()
{
//查询参数直接添加在queryParams中
var queryParams = $('#tt').datagrid('options').queryParams;
getQueryParams(queryParams);
$('#tt').datagrid('options').queryParams = queryParams;
$("#tt").datagrid('reload');
}
function add()
{
//清空内容
$('#fm').form('clear');
$('#dlg').dialog('open').dialog('setTitle', '添加邮箱');
document.getElementById("test").value = "add";
}
//修改
function editUser()
{
var row = $('#tt').datagrid('getSelected');
if (row == null) {
$.messager.alert("提示", "请选择要修改的行！", "info");
}
if (row) {
//获取要修改的字段
$('#tName').val(row.tName);
$('#tEmail').val(row.tEmail);
$('#dlg').dialog('open').dialog('setTitle', '修改邮箱');
document.getElementById("test").value = "modify";
$('#fm').form('load', row);
}
}
function removeUser()
{
var test = document.getElementById("test").value = "delete";
var row = $('#tt').datagrid('getSelected');
if (row == null) {
$.messager.alert("提示", "请选择要删除的行！", "info");
}
if (row) {
$.messager.confirm('提示', '你确定要删除这条信息吗？', function (r)
{
if (r) {
$('#fm').form('submit', {
url: 'Handler5.ashx/ProcessRequest?ID=' + row.ID + "&test=" + test,
onSubmit: function ()
{
//return $(this).form('validate');
},
success: function (result)
{
if (result.indexOf("T") == 0) {
$('#dlg').dialog('close');
//$('#tt').datagrid('clearSelections'); //清空选中的行
$.messager.alert("提示", "恭喜您，信息删除成功！", "info");
//alert('恭喜您，信息删除成功！')
// close the dialog
$('#tt').datagrid('reload');
//$('#fm').form('submit');
}
else {
$.messager.alert("提示", "删除失败，请重新操作！", "info");
//alert('添加失败，请重新操作！')
return;
//$('#fm').form('submit');
}
}
});
}
})
}
}
function saveUser() {
var tName = document.getElementById("tName").value;
var tEmail = document.getElementById("tEmail").value;
//alert(tName + "<br/>" + tEmail);
var test = document.getElementById("test").value;
if (test == "add") {
$('#fm').form('submit', {
url: "Handler5.ashx?test=" + test + "&tName=" + tName + "&tEmail=" + tEmail,
onSubmit: function ()
{
return $(this).form('validate');
},
success: function (result)
{
//alert(result);
if (result.indexOf("T") == 0) {
$('#dlg').dialog('close');
$.messager.alert("提示", "恭喜您，信息添加成功", "info");
//alert('恭喜您，信息添加成功！')
// close the dialog
$('#tt').datagrid('reload');
//$('#fm').form('submit');
}
else {
$.messager.alert("提示", "添加失败，请重新操作！", "info");
return;
//alert('添加失败，请重新操作！')
}
}
});
}
else {
var row = $('#tt').datagrid('getSelected');
if (row) {
//获取要修改的字段
var ID = row.ID;
//alert(ID);
}
$('#fm').form('submit', {
url: "Handler5.ashx?test=" + test + "&ID=" + ID + "&tName=" + tName + "&tEmail=" + tEmail,
onSubmit: function ()
{
return $(this).form('validate');
},
success: function (result) {
if (result.indexOf("T") == 0) {
$('#dlg').dialog('close');
//$('#tt').datagrid('clearSelections'); //清空选中的行
$.messager.alert("提示", "恭喜您，信息修改成功", "info");
//alert('恭喜您，信息添加成功！')
// close the dialog
$('#tt').datagrid('reload');
//$('#fm').form('submit');
}
else {
$.messager.alert("提示", "修改失败，请重新操作！", "info");
return;
//alert('添加失败，请重新操作！')
}
}
});
}
}
</script>
</head>
<body>
<form id="fm" method="post">
<div>
<%--表格显示区--%>
<table id="tt" title="设置" class="easyui-datagrid" style="width: auto; height: 660px;"
idField="ID" pagination="true" data-options="iconCls:'icon-save',rownumbers:true,url:'Handler5.ashx/ProcessRequest',pageSize:20, pageList:[20,30,40,50],method:'get',toolbar:'#tb',striped:true"
fitcolumns="true">
<%--striped="true"--%>
<%-- 表格标题--%>
<thead>
<tr>
<th data-options="field:'ID',checkbox:true">
</th>
<th data-options="field:'tName',width:100">
姓名
</th>
<th data-options="field:'tEmail',width:320,align:'center'">
邮箱
</th>
</tr>
</thead>
<%--表格内容--%>
</table>
<%--功能区--%>
<div id="tb" style="padding: 5px; height: auto">
<%-- 包括添加，修改、删除 --%>
<div style="margin-bottom: 5px">
<a href="javascript:void(0)" onclick="add()" class="easyui-linkbutton" data-options="iconCls:'icon-add',plain:true"></a>
<a href="javascript:void(0)" onclick="editUser() " class="easyui-linkbutton" data-options="iconCls:'icon-edit',plain:true"></a>
<a href="javascript:void(0)" onclick="removeUser()" class="easyui-linkbutton" data-options="iconCls:'icon-remove',plain:true"></a>
</div>
<%-- 查找信息 --%>
<div>
姓名:
<input id="tkey" />
<a href="#" class="easyui-linkbutton" data-options="iconCls:'icon-search'" onclick="reloadgrid()">
Search</a>
</div>
</div>
<div id="dlg" class="easyui-dialog" style="width: 400px; height: auto; padding: 10px 20px"
data-options="closed:true,buttons:'#dlg-buttons'">
<%--closed="true" buttons="#dlg-buttons"--%>
<div class="ftitle">
邮箱信息</div>
<div class="fitem">
<label>
姓名：</label>
<input id="tName" name="tName" class="easyui-validatebox" data-options="required:true" />
</div>
<div class="fitem">
<label>
邮箱：</label>
<input id="tEmail" name="tEmail" class="easyui-validatebox" data-options="required:true" />
<input name="Test" id="test" type="hidden" />
<input name="ID" id="ID" type="hidden" />
<input id="key" name="key" onkeydown="if(event.keyCode==13)reloadgrid()" type="hidden" />
</div>
</div>
<div id="dlg-buttons">
<a href="#" class="easyui-linkbutton" data-options="iconCls:'icon-ok'" onclick="saveUser()">
保存</a> <a href="#" class="easyui-linkbutton" data-options="iconCls:'icon-cancel'"
onclick="javascript:$('#dlg').dialog('close')">关闭</a>
</div>
</div>
</form>
</body>
</html>然后这里就是一般处理程序
Handler5.ashx
<%@ WebHandler Language="C#" Class="Handler5" %>
using System;
using System.Web;
using System.Data;
using System.Data.SqlClient;
using System.IO;
using System.Text;
public class Handler5 : IHttpHandler {
public void ProcessRequest(HttpContext context)
{
string command = context.Request.QueryString["test"];//前台传的标示值
if (command == "add")
{//调用添加方法
Add(context);
}
else if (command == "modify")
{//调用修改方法
Modify(context);
}
else if (command == "delete")
{
Delete(context);
}
else
{
Query(context);
}
//Query(context);
}
public bool IsReusable
{
get
{
return false;
}
}
public void Add(HttpContext context)
{
context.Response.ContentType = "text/plain";
string xx = string.Empty;
string tname = context.Request.QueryString["tName"];
string temail = context.Request.QueryString["tEmail"];
SqlHelp sqla = new SqlHelp();
string sqlString = "insert into Rex_Test(tName,tEmail) values('" + tname + "','" + temail + "')";
bool aa= sqla.ExecuteNonQuery(sqlString);
sqla.SqlClose();
if (aa)
{
xx = "True";
}
else
{
xx="False";
}
context.Response.Write(xx);
}
public void Modify(HttpContext context)
{
context.Response.ContentType = "text/plain";
string yy = string.Empty;
string id = context.Request.QueryString["ID"];
string tname = context.Request.QueryString["tName"];
string temail = context.Request.QueryString["tEmail"];
SqlHelp sqlb = new SqlHelp();
string sqlString = "update Rex_Test set tName='"+tname+"',tEmail='"+temail+"' where ID='"+id+"'";
bool bb= sqlb.ExecuteNonQuery(sqlString);
sqlb.SqlClose();
if (bb)
{
yy = "True";
}
else
{
yy = "False";
}
context.Response.Write(yy);
}
public void Delete(HttpContext context)
{
context.Response.ContentType = "text/plain";
string zz = string.Empty;
string id=context.Request.QueryString["ID"];
SqlHelp sqlc = new SqlHelp();
string strfacc = "delete from Rex_Test where ID='"+id+"'";
sqlc.ExecuteNonQuery(strfacc);
sqlc.SqlClose();
context.Response.Write("True");
}
/// <summary>
/// 查询记录
/// </summary>
/// <param name="context"></param>
public void Query(HttpContext context)
{
context.Response.ContentType = "text/plain";
//===============================================================
string tkey;
tkey = "";
//获取前台传来的值
if (null != context.Request.QueryString["tkey"])
{//获取前台传来的值
tkey = context.Request.QueryString["tkey"].ToString().Trim();
}
//================================================================
//获取分页和排序信息：页大小，页码，排序方式，排序字段
int pageRows, page;
pageRows = 10;
page = 1;
string order, sort, oderby; order = sort = oderby = "";
if (null != context.Request.QueryString["rows"])
{
pageRows = int.Parse(context.Request.QueryString["rows"].ToString().Trim());
}
if (null != context.Request.QueryString["page"])
{
page = int.Parse(context.Request.QueryString["page"].ToString().Trim());
}
if (null != context.Request.QueryString["sort"])
{
order = context.Request.QueryString["sort"].ToString().Trim();
}
if (null != context.Request.QueryString["order"])
{
sort = context.Request.QueryString["order"].ToString().Trim();
}
//===================================================================
//组合查询语句：条件+排序
StringBuilder strWhere = new StringBuilder();
if (tkey != "")
{
strWhere.AppendFormat("tName like '%{0}%' and ", tkey);
}
//删除多余的and
int startindex = strWhere.ToString().LastIndexOf("and");//获取最后一个and的位置
if (startindex >= 0)
{
strWhere.Remove(startindex, 3);//删除多余的and关键字
}
if (sort != "" && order != "")
{
//strWhere.AppendFormat(" order by {0} {1}", sort, order);//添加排序
oderby = order + " " + sort;
}
//DataSet ds = Bnotice.GetList(strWhere.ToString()); //调用不分页的getlist
//调用分页的GetList方法
DataSet ds = GetListByPage(strWhere.ToString(), oderby, (page - 1) * pageRows + 1, page * pageRows);
int count = GetRecordCount(strWhere.ToString());//获取条数
string strJson = ToJson.Dataset2Json(ds, count);//DataSet数据转化为Json数据
context.Response.Write(strJson);//返回给前台页面
context.Response.End();
}
public int GetRecordCount(string strWhere)
{
SqlHelp sqlx = new SqlHelp();
StringBuilder strSql = new StringBuilder();
strSql.Append("select count(1) FROM Rex_Test");
if (strWhere.Trim() != "")
{
strSql.Append(" where " + strWhere);
}
int obj = sqlx.ReturnCount(strSql.ToString());
sqlx.SqlClose();
if (obj<=0)
{
return 0;
}
else
{
return Convert.ToInt32(obj);
}
}
/// <summary>
/// 分页获取数据列表
/// </summary>
public DataSet GetListByPage(string strWhere, string orderby, int startIndex, int endIndex)
{
SqlHelp sqly = new SqlHelp();
try
{
StringBuilder strSql = new StringBuilder();
strSql.Append("SELECT * FROM ( ");
strSql.Append(" SELECT ROW_NUMBER() OVER (");
if (!string.IsNullOrEmpty(orderby.Trim()))
{
strSql.Append("order by T." + orderby);
}
else
{
strSql.Append("order by ID asc");
}
strSql.Append(")AS Row, T.* from Rex_Test T ");
if (!string.IsNullOrEmpty(strWhere.Trim()))
{
strSql.Append(" WHERE " + strWhere);
}
strSql.Append(" ) TT");
strSql.AppendFormat(" WHERE TT.Row between {0} and {1}", startIndex, endIndex);
return sqly.GetDataSet(strSql.ToString());
}
finally { sqly.SqlClose(); }
}
}最有还有一个Json转换类
ToJson.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.IO;
/// <summary>
///ToJson 的摘要说明
/// </summary>
public class ToJson
{
/// <summary>
/// DataSet转换成Json格式
/// </summary>
/// <paramname="ds">DataSet</param>
///<returns></returns>
public static string Dataset2Json(DataSet ds, int total = -1)
{
StringBuilder json = new StringBuilder();
foreach (DataTable dt in ds.Tables)
{
//{"total":5,"rows":[
json.Append("{\"total\":");
if (total == -1)
{
json.Append(dt.Rows.Count);
}
else
{
json.Append(total);
}
json.Append(",\"rows\":[");
json.Append(DataTable2Json(dt));
json.Append("]}");
}
return json.ToString();
}
/// <summary>
/// dataTable转换成Json格式
/// </summary>
/// <paramname="dt"></param>
///<returns></returns>
public static string DataTable2Json(DataTable dt)
{
StringBuilder jsonBuilder = new StringBuilder();
for (int i = 0; i <dt.Rows.Count; i++)
{
jsonBuilder.Append("{");
for (int j = 0; j <dt.Columns.Count; j++)
{
jsonBuilder.Append("\"");
jsonBuilder.Append(dt.Columns[j].ColumnName);
jsonBuilder.Append("\":\"");
jsonBuilder.Append(dt.Rows[i][j].ToString());
jsonBuilder.Append("\",");
}
if (dt.Columns.Count > 0)
{
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
}
jsonBuilder.Append("},");
}
if (dt.Rows.Count > 0)
{
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
}
return jsonBuilder.ToString();
}
}通过以上几步，基本上可以实现DataGrid的增删改查，其它功能还在学习中，请多多指教。
哦，对了，我发现这个Jqurey EasyUI DataGrid的一些功能，比如刷新、分页这些在IE11下，不怎么兼容样，如果有知道解决方法的朋友，希望可以留言，给大家分享一下，谢了。
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